Internal-combustion engine.



W. BOYD.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED MAR. 25. 1915.

1,229.2 1 6. Patented June 12, 1917.

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entor,

Attorneys,

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WYATT BOYD, CANTON, OHIO.

INTERNAL-COMBUSTION ENGINE.

' Specification of Letters Patent.

Application filed March 25, 1915. Serial No. 16,956.

To all whom it may concern:

Be it known that I, W'YATT BOYD, a citi- Zen of the United States,residing at Canto-n, in the county of Stark and State of Ohio, haveinvented a new and useful Internal- Combustion Engine, of which thefollowing is a specification. I

The present invention appertains to'internal combustion engines, andaims to provide a two-cycle engine of novel and improved construction,and one which is devoid of valvesand valve gears It is also within thescope of the invention to provide a two-cycle engine embodying a uniqueassemblage of the component parts and which is comparatively simple inconstruction, as well as being vpractical and et ficient in operation.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment oi the invention herein disclosed can be made within thescope of what is claimed without departing from the spirit of theinvention.

The invention is illustrated in the accompanying drawing, wherein-Figure 1 is a longitudinal section of the improved structure.

Fig. 2 is a cross section thereof taken on the line 22 of Fig. 1.

In the drawings, the numeral 1 designates the engine cylinder, which isbolted or otherwise secured to a closed crank case in the manner of anordinary two-cycle engine. The cylinder 1 is provided at its head endwith a water jacket 2, and the said head end of the cylinder isdo-meshaped, as at 3, and is provided with a central opening 1.

The cylinder 1 is also provided between its ends with an annular exhaustchamber 5 at the lower end of the water jacket 2, there being an annularpartition 6 between the water jacket and exhaust chamber, and the wallsof the cylinder 1 having openings or apertures 7 for establishingcommunication between the interior of the cylinder and the exhaustchamber 5. The exhaust chamber 5 is provided with a nipple 8 for theattachment of the exhaust pipe if one is employed, the nipple 8providing an outlet for the exhaust chamber.

The piston 9 which reciprocates within the cylinder 1 is provided with adomeshaped head or end 11 which is adapted to move relatively close tothe dome-shaped end 3 ofthe cylinder, the connecting rod 10 beingconnected to the piston 9 in the ordinary manner. The dome-shaped end 11of the piston is provided with an integral upwardly or outwardlyprojecting tubular extension 12 sliding through the opening 5 of thecylinder. The tubular extension 12 is disposed axially withinv thecylinder and projects out through the opening 41, the outer end of theextension 12 being closed, and the extension being rovided at one sideand adjacent its outer enc with longitudinal slots 13 providing inletsfor the extension.

An upstanding inlet chamber 14 having its upper end closed and its lowerend open, is carried by the u per or outer end of the cylinder, the chamber 14 having its lower end contracted to form a neck 15 through whichthe extension 12 is slidable snugly, and the neck 15 is provided with anoutturned flange 16 resting upon an abutment 17 formed upon the outerend of the cylinder around the opening 4;. The flange 16 is secured tothe abutment 17 by means of bolts or other securing means 18 engagedthrough the flange and taking into the abutment, and the lower end 01:the chamber 14 is provided with an annular rabbet 19 surrounding theopening 4 and in which a packing ring 20 is disposed, so that thepacking ring 20 will be clamped tightly between the rabbet 19 and theabutment 17 so as to embrace the extension 12 and prevent leakage. Thechamber 14 is provided with a lateral inlet nipple 21 for the attachmentof an intake manifold or conduit leading from the carbureter. Thechamber 14 is of a greater diameter than the extension 12, whereby whenthe extension is raised or moved outwardly within the chamber 1 1, anannular space will be provided between the walls of the cham ber andextension.

The parts are so arranged, that when the piston 11 is at the end of itsinward or downward stroke, as illustrated in Fig. 1,

the exhaust openings or ports 7 are uncovered, and the inner end of theslots 13 are just moved within the upper end of the cylinder, asillustrated in the said'figure.

.In operation, assuming the parts to be arranged as illustratedin Fig.1, the piston 9 in moving outward or upward willimmediately close theports 7, and the extension Patented June 12, 1917.

12 being moved outward will move the slots 13 out of the cylinder, forenabling the charge within the cylinder to becompressed during thecompletion of the upwardstroke of the piston. At the same time, theextension 12 being outward into the chamber 14', will bring the slots 13within the said chamber 14, and as a result the gaseous fuel may flowfrom Within the chamber 14 through the: slots 18 r and into theextension 12, and thence through the piston 11 into the crank case (notshown). After the compression stroke is completed, the charge is ignitedby means of a spark plug (not shown), or other suitable igniter, whichwill force the piston 11 inward through the power stroke. During theinward or power stroke of the piston, the gaseous fuel within the crankcase will be compressed by the inward movement of the piston, and whenthe piston 11 reaches the end of its inward or power stroke, the exhaustports 7 will be uncovered by the piston, to allow the exhaust to escape,and at the same time the extension 12 being held inwardly with thepiston, will bring the inner end of the slot xl3 within the cylinder.This enables the compressed fuel below the piston to pass upwardlythrough the extension 12 and out through. the slots. 13 into thecylinder, to assist in ejecting the burnt gases, and to introduce thenew charge into the cylinder. Then when the piston is moved outward, itwill compress the new charge and the operation will be repeated. Thepresent engine is therefore of the two- Copies of this patent may beobtained for time in the presence. of

outstanding chamber having a reduced open":

end snugly receiving said tubular member and provided with an outturnedflange resting upon said abutment, said'reduced end having an annularrabbet surrounding said opening, securing elements engaged through saidflange and taking into the abutment, and a packing ring disposed tightlybetween said abutment and rabbet and embracing said tubular member, theend of said tubular member being closed, said tubular member 1 having anopening near its end movable past said packing ring into the cylinderand into said chamber beyond the reduced open end thereof.

In testimony that I claim the foregoing:

as my own, I have hereto afiiXed mysignatwo witnesses. WYATT BOYD.Witnesses:

LESTER P. RICE,

ANNIE W. DEWALT.

five cents each, by addressing the Commissioner of Patents, Washington,D. 0.

